<html>
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	</head>
	<body>

<?php

		$username = $_POST["username"];
		$userpass = $_POST["userpass"];
				   
		echo $username;   
		echo $userpass;  

//连接数据库
	$conn = mysql_connect("127.0.0.1","root","root");
 
	//选择数据库
	mysql_select_db("db_news", $conn);
 
	mysql_query("SET NAMES utf8");
 
 //获取界面传送的用户名和密码
	// $username = $_POST['username'];
	// $password = $_POST['password'];
	
	//执行SQL语句
	$sql = "select * from tbl_user where uname='$username'";
	echo $sql;
	$check_quary = mysql_query($sql);
 
	//将查询到的结果写入$result
	$result = array();
	$result = mysql_fetch_assoc($check_quary);
 
	//判断从前端获取的密码是否和数据库中的一样
	//一样，则跳转到目标网页
	if($userpass == $result['upass']){
		header("Location:http:./main/index.html");
	}
	else{
		//不一样则弹出提示框，回退到登录界面
		echo "<script>alert('用户名或密码不正确,请重新输入');history.back();</script>";
	}
?>
		
	</body>

</html>